I think it depends on the shape of your knees and ankles.I have skinny ankles (and fat knock knees, there's a reason I don't wear skirts much!) so they are a no-no.They look ok if all bits are in proportion.

Shoe boots remind me of a Ladybird book I had as a child 'the Elves and the Shoemaker' the shoes the elves made were shoe boots, in lovely colours and the softest leather naturally, but all the same I like the association...

I just bought a gorgeous pair of shoe boots from Autograph at m&s. Can't do links on this gadget, sorry. But they are a high heel with suede uppers. I have a touch of the cankle but these helped to elongate my legs because they are cut quite low on the foot rather than up around the ankle, iyswim.